Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

No annotations are provided, but the description fully describes the output (tool names and descriptions) and the filtering behavior. It is a discovery tool with no side effects, and the description accurately reflects its read-only nature.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is two sentences plus a tip, concise and well-organized. Every sentence adds value without wasted words.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

The description adequately explains the tool's purpose, input, and output. Given that there is no output schema, the description compensates by stating what is returned (tool names and descriptions). The single parameter is fully documented.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema description coverage is 100% (enum values are described in schema). The description repeats the categories and indicates the parameter is optional, but does not add significant meaning beyond what the schema provides.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Does the description clearly state what the tool does and how it differs from similar tools?

The description clearly states that the tool 'Returns tool names and one-line descriptions, organized by category.' This is a specific verb+resource combination that distinguishes it from sibling tools which are specific action tools.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Does the description explain when to use this tool, when not to, or what alternatives exist?

The description explains when to call with no arguments vs. with a category, and lists all categories. It also provides a tip about loading only specific categories. However, it does not explicitly state when not to use this tool or mention alternatives.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.